BirdAnalyst
Species · South Carolina · BBS 2026 Release · 1966–2025

Cooper's Hawk Population Trend in South Carolina

All statesBirds of prey

Cooper's Hawk in South Carolina has declined: down 44% on the route-weighted index since 1968.

-44%Since 1968TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
30Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
40YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Cooper's Hawk Trends in South CarolinaNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for Cooper's Hawk in South Carolina. See the full index history below.

Cooper's Hawk Population Forecast in South Carolina

If the recent trend holds, Cooper's Hawk in South Carolina is projected to stay roughly flat through 2030, near 0.07 (95% range 0.00–0.17). A 5-year backtest shows a typical error of ±42.7%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2030TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
0.07Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.1795% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±42.7%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Cooper's Hawk in South Carolina is projected to stay roughly flat through 2030, near 0.07 (95% range 0.00–0.17). A 5-year backtest shows a typical error of ±42.7%, with 100% of held-out values landing inside the 95% band.19662030
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20260.080.000.18
20270.080.000.17
20280.070.000.17
20290.070.000.17
20300.070.000.17

Cooper's Hawk Survey Routes in South Carolina

Routes recording Cooper's Hawk in South Carolina.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Campobello220102010
Chesnee220071992
Jamestown119791972
Hardeeville120181993
Rome119881967
Holly Hill120232017
Coward120251968
Kiawah Island120132004
New Holland120051996
Wagener120192012
Dillon119961996
Bishopville120051987
Boykin Ml Pd119671966
Walterboro120172017
Pendleton119671967
Barton Creek120151990
Plum Branch119811981
Whitmire120232023
Salem120232021
Blacksburg120102003
Joanna120192017
Bennettsville120022002
Olar120072007
Pinewood120002000
Nixville120102010

Cooper's Hawk Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.